i had a similar experience when i was 23. i was compelled to look out my back window, it was night and dark out side. this was in a town of 200 people. the only thing behind my house was a mountain. anyways, i saw a bright white light in the form of a circle on the ground in my yard. there were no street lights, no planes or people with flash lights, nothing out there but this light. my first thought was a very old knowing of "aliens'. which surprised me cause i dont believe they exist. i told my dad about this and he said he has seen the same thing in the back yard, about 20 times or so.

i am like you, guess i will found out the reason behind this in the afterlife, cause i have no idea now.